JT Sprockets Aluminum Rear Sprocket - 44T , Sprocket Teeth: 44, Color: Natural, Sprocket Size: 520, Sprocket Position: Rear, Material: Aluminum JTA210.44 Made from the latest generation of computer design and control metal cutting equipment for maximum durability Rear sprockets are made from the finest C45 high carbon steel or 7075 aluminum All sprockets are heat treated and hand finished to meet or exceed the highest possible quality standards